21288978

素因数分解:

$2^1\times 3^2\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:331

約数の個数: 48

約数和(自身を含む): 47469240

約数和(自身を除く): 26180262

約数列:

[1, 2, 3, 6, 9, 18, 89, 97, 137, 178, 194, 267, 274, 291, 411, 534, 582, 801, 822, 873, 1233, 1602, 1746, 2466, 8633, 12193, 13289, 17266, 24386, 25899, 26578, 36579, 39867, 51798, 73158, 77697, 79734, 109737, 119601, 155394, 219474, 239202, 1182721, 2365442, 3548163, 7096326, 10644489, 21288978]

約数ペア:

[(1, 21288978), (2, 10644489), (3, 7096326), (6, 3548163), (9, 2365442), (18, 1182721), (89, 239202), (97, 219474), (137, 155394), (178, 119601), (194, 109737), (267, 79734), (274, 77697), (291, 73158), (411, 51798), (534, 39867), (582, 36579), (801, 26578), (822, 25899), (873, 24386), (1233, 17266), (1602, 13289), (1746, 12193), (2466, 8633)]